fix: select * from (select * from t order by ts desc) order by ts

source/libs/planner/src/planOptimizer.c

@@ -1079,11 +1079,23 @@ static bool sortPriKeyOptMayBeOptimized(SLogicNode* pNode) {
   if (!sortPriKeyOptIsPriKeyOrderBy(pSort->pSortKeys) || 1 != LIST_LENGTH(pSort->node.pChildren)) {
     return false;
   }
+  SNode* pChild;
+  FOREACH(pChild, pSort->node.pChildren) {
+    SLogicNode* pSortDescendent = optFindPossibleNode((SLogicNode*)pChild, sortPriKeyOptMayBeOptimized);
+    if (pSortDescendent != NULL) {
+      return false;
+    }
+  }
   return true;
 }
 
 static int32_t sortPriKeyOptGetSequencingNodesImpl(SLogicNode* pNode, bool groupSort, bool* pNotOptimize,
                                                    SNodeList** pSequencingNodes) {
+  if (NULL != pNode->pLimit || NULL != pNode->pSlimit) {
+    *pNotOptimize = false;
+    return TSDB_CODE_SUCCESS;
+  }
+  
   switch (nodeType(pNode)) {
     case QUERY_NODE_LOGIC_PLAN_SCAN: {
       SScanLogicNode* pScan = (SScanLogicNode*)pNode;

tests/parallel_test/cases.task

@@ -875,6 +875,7 @@
 ,,y,script,./test.sh -f tsim/query/udf_with_const.sim
 ,,y,script,./test.sh -f tsim/query/join_interval.sim
 ,,y,script,./test.sh -f tsim/query/unionall_as_table.sim
+,,y,script,./test.sh -f tsim/query/multi_order_by.sim
 ,,y,script,./test.sh -f tsim/query/sys_tbname.sim
 ,,y,script,./test.sh -f tsim/query/groupby.sim
 ,,y,script,./test.sh -f tsim/query/event.sim

tests/script/tsim/query/multi_order_by.sim

@@ -0,0 +1,57 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/exec.sh -n dnode1 -s start
+sql connect
+
+sql create database test;
+sql use test;
+
+sql create table t(ts timestamp, f int);
+sql insert into t values(now,0)(now+1s, 1)(now+2s, 2)(now+3s,3)(now+4s,4)(now+5s,5)(now+6s,6)(now+7s,7)(now+8s,8)(now+9s,9)
+sql select * from (select * from t order by ts desc limit 3 offset 2) order by ts;
+print $data01 $data11 $data21
+if $data01 != 5 then
+  return -1
+endi
+if $data11 != 6 then
+  return -1
+endi
+if $data21 != 7 then
+  return -1
+endi
+sql select * from (select * from t order by ts limit 3 offset 2) order by ts desc;
+print $data01 $data11 $data21
+if $data01 != 4 then
+  return -1
+endi
+if $data11 != 3 then
+  return -1
+endi
+if $data21 != 2 then
+  return -1
+endi
+sql select * from (select * from t order by ts desc limit 3 offset 2) order by ts desc;
+print $data01 $data11 $data21
+if $data01 != 7 then
+  return -1
+endi
+if $data11 != 6 then
+  return -1
+endi
+if $data21 != 5 then
+  return -1
+endi
+sql select * from (select * from t order by ts limit 3 offset 2) order by ts;
+print $data01 $data11 $data21
+if $data01 != 2 then
+  return -1
+endi
+if $data11 != 3 then
+  return -1
+endi
+if $data21 != 4 then
+  return -1
+endi
+
+
+system sh/exec.sh -n dnode1 -s stop -x SIGINT